Seemed to be completely OK, a driver who is on the safe side would have just done this exactly

If you stay there, blocking traffic for no reason, and do not proceed when you are clear to go, as it did until the driver accelerated, you will fail a driving license exam in most countries.

Maybe it would have moved a second later...

"Most countries" would fail a driver for not crossing an intersection until there is space on the other side? I think you're being a little absurd here.

The driver in this case could see that the cars beyond the blue car were starting to move, and thus predict that he could cross a little bit early (betting on the space being available by the end of the maneuver, but risking being the ass who ends up blocking the crosswalk after miscalculating).

Here in the UK you'd be failed for blocking an intersection.

Totally, you are not supposed to block an intersection, and it is forbidden to stay on a pedestrian crossing.

Again...that was not the failure. Actually there are two failures:

- First one, to stop too far away both from the road intersection and the pedestrian crossing. And of course you should not stop on top the pedestrian crossing. The car behind the Tesla, noticed that right away, and went over the Tesla. Even the Tesla driver in the video commented on that. I wonder what FSD version that driver has :-)

- Second failure, the car ahead, the one already over the road crossing started moving but the Tesla would not move at all. Only when the video author accelerated as he mentions in the video.